Mutation Effect of Streptomyces kitasatoensis after Exposure to Heavy Ions Radiation
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Graphical Abstract
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Abstract
To define the optimum dose of heavy ion beams for selecting high productive strains， we should study mortality and mutation effects of Streptomyces kitasatoensis irradiated by heavy ion beams in diffe rent doses. In this research， spores of Streptomyces kitasatoensis were irradiated by heavy ion beams with different doses. And survival rate， mortality rate， positive mutation and negative mutation were analyzed statistically. The results showed that high mortality rate appeared from 5 Gy and then the mortality rate curve became gently. Compared the positive and negative mutations in different doses， highest positive mutation was obtained in 40 Gy， while the negative mutation was lower in this dose， and the survival rate was 0.92%. So we defined that optimum dose of heavy ions radiation for Streptomyces kitasatoensis selection was 40 Gy in this experiment.
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